Petro-Canada PURITY™ FG Food Grade Heat Transfer Fluid is formulated to help lower operating costs by reducing the frequency of fluid change-outs in operations that require a food grade product. PURITY FG Heat Transfer Fluid’s unique chemistry starts with a blend of 99.9% crystal-clear base fluids, produced from a HT Purity Process. These crystal-clear fluids are free of impurities that can hinder performance. Utilizing more than 30 years of formulating experience, Petro-Canada fortifies these thermally stable fluids with specially selected additives to provide outstanding protection from oxidative breakdown.

The result is PURITY FG Heat Transfer Fluid, a food grade fluid that provides high thermal efficiency in systems operating up to 326°C (620°F). PURITY FG Heat Transfer Fluid's breakthrough chemistry can assist in extending fluid life longer than leading competitive fluids, and help lower operating costs by reducing the frequency of fluid change-outs.

Applications

Petro-Canada PURITY FG Heat Transfer Fluid is recommended for use in non pressurized, liquid phase, closed heat transfer systems used in food processing or pharmaceutical operations with continuous bulk operating temperatures up to 326°C (620°F). Typical applications include central cooking facilities, drying, edible oil

deodourizing and the heating of deep frying oils.

PURITY FG Heat Transfer Fluid may also be used in heating baths where a virtually odourless, nontoxic* fluid is required for worker health and

safety.

PURITY FG Heat Transfer Fluid’s outstanding resistance to oxidative breakdown is also beneficial in food related manufacturing operations where exposure to air can not be avoided, and oxidation is the most likely form of fluid degradation. Common applications include the manufacture of plastic bottles, films and containers for the packaging of food products.

 

• Higher thermal and oxidative stability than leading competitors which can help extend fluid life and lower operating costs

• More thermally stable than leading competitive fluids, even full synthetics Thermal stressing of a heat transfer fluid can cause the formation of light molecular

compounds. These compounds can:

– raise a fluid’s vapour pressure, which can cause fluid leakage from control valves and pipe flanges, circulating pump cavitation and vapour locking

– dramatically reduce a fluid’s autoignition temperature, the lowest temperature that a fluid will combust, without flame or spark, in the presence of oxygen

– lower the operating temperature at which the heat transfer system can safely operate

– necessitate a costly, premature fluid change-out

In Ampoule studies, conducted at 316°C (600°F), PURITY FG Heat Transfer Fluid remained thermally stable and maintained its autoignition temperature throughout the 56 day test; three times longer than two leading specialty fluids and more than 20% longer than a major oil company’s synthetic fluid:

 

- Fully registered for use in and around food processing areas

- PURITY FG Heat Transfer Fluid also meets the highest industry purity standards and fits perfectly in HACCP (Hazard Analysis Critical Control Point) and

GMP (Good Manufacturing Practice) plans:

- HT1 registered by NSF
-  All fluid components comply with FDA 21 CFR 178.3570 “Lubricants with incidental food contact”

- Acceptable for use in food processing facilities.

- Certified Kosher and Pareve by Star K

- Certified Halal by IFANCA

Typical Properties

THERMAL DATA	TEMPERATURE
	15°C (60°F)	38°C (100°F)	260°C (500°F)	316°C (600°F)
Density, kg/L (lb./ft3)	0.868 (54.2)	0.854 (53.3)	0.716 (44.7)	0.681 (42.5)
Thermal conductivity, W/m K (BTU/hr. °FFt)	0.138 (0.080)	0.136 (0.079)	0.124 (0.072)	0.121 (0.070)
Heat capacity, kJ/kg K (BTU/lb. °F)	1.87 (0.45)	1.94 (0.46)	2.69 (0.64)	2.88 (0.69)
Vapour pressure, kPa (psia)	0.00 (0.00)		3.01 (0.44)	14.28 (2.05)

 

 

PURITY FG Heat Transfer Fluid’s high thermal stability provides long service life under normal operating conditions up to its maximum recommended temperature. However, actual fluid life is dependent upon system design and operating practice. Special precautions should be taken to avoid operating conditions that can shorten fluid life.

These include:

- thermal shocking resulting from accelerated system temperature increases

- thermal shocking from hot spots on a system’s heating coils

- continuously running above the maximum recommended operating temperature

Although PURITY FG Heat Transfer Fluid is highly resistant to oxidative breakdown, excessive air and water contamination can reduce thermal efficiency and shorten fluid life. Where practical, Petro-Canada recommends inert gas blanketing of a system’s expansion tank to guard against exposure to air and water and the need to change-out the fluid prematurely. While PURITY FG Heat Transfer Fluid has been formulated for high resistance to contamination from air and water, contamination with process chemicals or deteriorated residual fluids can shorten fluid life. To maximize system efficiency and fluid life, Petro-Canada highly recommends system flushing prior to recharging with PURITY FG Heat Transfer Fluid.

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